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Debt - Schedule of Debt (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Nov. 30, 2014 | Oct. 31, 2014
--- | --- | --- | --- | --- | ---
Debt Instrument |  |  |  |  |
Total debt, gross | $ 3,425,000 | $ 3,450,000 |  |  |
Unamortized discount | (8,319) | (8,738) |  |  |
Unamortized debt issuance costs | (16,804) | (17,880) |  |  |
Total, net of discount | 3,399,877 | 3,423,382 |  |  |
Current portion of long-term debt | 0 | 249,999 |  |  |
Long-term debt | $ 3,399,877 | 3,173,383 |  |  |
Senior notes |  |  |  |  |
Debt Instrument |  |  |  |  |
Unamortized discount |  |  | $ (6,700) | $ (4,000) |
Fixed-rate 3.375% Senior Notes due on November 1, 2019 | Senior notes |  |  |  |  |
Debt Instrument |  |  |  |  |
Stated interest rate | 3.375% |  |  |  |
Total debt, gross | $ 0 | $ 250,000 |  |  |
Effective interest rate | 0.00% | 3.377% |  |  |
Fixed-rate 4.125% Senior Notes due on November 1, 2021 | Senior notes |  |  |  |  |
Debt Instrument |  |  |  |  |
Stated interest rate | 4.125% |  |  |  |
Total debt, gross | $ 500,000 | $ 500,000 |  |  |
Effective interest rate | 4.128% | 4.128% |  |  |
Fixed-rate 4.650% Senior Notes due on November 1, 2024 | Senior notes |  |  |  |  |
Debt Instrument |  |  |  |  |
Stated interest rate | 4.65% |  |  |  | 4.65%
Total debt, gross | $ 1,250,000 | $ 1,250,000 |  |  |
Effective interest rate | 4.682% | 4.682% |  |  |
Fixed-rate 5.650% Senior Notes due on November 1, 2034 | Senior notes |  |  |  |  |
Debt Instrument |  |  |  |  |
Stated interest rate | 5.65% |  |  |  |
Total debt, gross | $ 250,000 | $ 250,000 |  |  |
Effective interest rate | 5.67% | 5.67% |  |  |
Fixed-rate 4.100% Senior Notes due on March 15, 2029 | Senior notes |  |  |  |  |
Debt Instrument |  |  |  |  |
Stated interest rate | 4.10% |  |  |  |
Total debt, gross | $ 800,000 | $ 800,000 |  |  |
Effective interest rate | 4.159% | 4.159% |  |  |
Fixed-rate 5.000% Senior Notes due on March 15, 2049 | Senior notes |  |  |  |  |
Debt Instrument |  |  |  |  |
Stated interest rate | 5.00% |  |  |  |
Total debt, gross | $ 400,000 | $ 400,000 |  |  |
Effective interest rate | 5.047% | 5.047% |  |  |
Revolving credit facility | Line of credit |  |  |  |  |
Debt Instrument |  |  |  |  |
Total debt, gross | $ 225,000 | $ 0 |  |  |
Effective interest rate | 2.84% |  |  |  |

X
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